Jjelbebo



D. WELLS.

AUTOMATIC SPARK THVIING MECHANISM.

APPLICATION FILED JAN-3.1918- latvuivd July 15, 19K).

WITNESSES ATTOR N EV antenna: wants, or raoLI, rnnran'a.

AUTOMATIC SPARK-TIMHIG' MECHANISM.

newest.

Specification of Letters Patent.

Patented July 15, acre.

Application filed January 3. 1918. Serial No. 210.170. I

and retarded in accordance-with the varying v engine speeds andthe explosive mixture supplied at the different speeds, where the mixture changes from a rich mixture as used at idling and at low speeds to a relatively lean mixture supplied at the higher speeds and effect an economy of fuel with a maximum amount of power generated, independently of the control of the operator.

One object of the invention is to provide a device that will automatically vary the.

time of ignition through governing instrumentalities.

' Another object of the invention is to pro- Vide a device thatemploys a governing instrumentality that includes a slidable member positively actuating. or rotating the timer and distributor to vary the time of ignition in conformity with engine speeds and the expenditure supplied.

A further object of the invention is to provide a device that will automatically change the time of ignition or firing the explosive charge in the cylinder independently of manual control to lessen the chances of improper time of firing, due to the human equation.

Broadly stated, the invention comprises a' member secured to a driving or operating shaft, pivotally mounted centrifugal ele-' ments carried by'the member, said elements being provided at one end with fingers that are adapted to engage with a grooved member slidable on said shaft, resilient means operably connected with the centrifugal e'lements to vary the degree of movement upon rotation of the shaft, and adjustable means for connecting the timer and distributor with the slidable member.

One practical form of construction and assembly will be described and illustrated in the accompanying drawings, in which Figure 1 is a side elevation of the assembled device,

Fig. 2 is a top plan view of the assembly,

Fig. 3 is an end elevation looking at the left hand end of Fig. 1, and

Fig. 4 is a sectional view on the line 44 of Fig. 1. p

-' In the preferred embodiment as illustrated .by the assembly shown in the accompanying drawings, a rotatably mounted shaft 5 is carried in the pedestal bearings 6 and 7. These bearings are preferably spaced apart and -m 'alinement so that'the shaftb may rotate .freely therein. The bases of these bearings 6 and-7 may be provided with the usual holes to permit of the employment,

of the foundation bolts indicated at 8'.

- As shownin Fig. 2 these bearings 6 and 7 are secured by means of the foundation bolts -8 to a channel member 9' formin one of the frame membersof a self prope led vehicle.

The bearings may be supplied with the usual or customary lubricating cups. 10; The shaft 5 may project beyond the bearing 6 and be provided with a driving pulley 11 as shown in Figs. 1 and 2. The pulley may be driven by means of a belt 12.

The inner ends of the bearings 6 and 7 are provided with suitable screw holes to permit of the attachment of the brackets 13 and 14. These brackets are provided at their lower ends with suitable curved feet indicated at 15 and 16. The curvature of the feet is such that they may lie in close contact with the bearings '6 and 7. These feet are also supplied with holes through which are adapted to pass suitable securing means such as the screws 17. As shown in A Fig. 3 these pedestal bearings are spaced from and slightly above the channel member 9 by means of the curved arms 18 and 19,

18 being more particularly shown -'in this figure.

The upper ends of the brackets 13 and 14 are recessed to provide the tongues 20 and 21. These tongues are provided transversely with suitable holes through which pass the fastening means 22 and 23, which may be pins. To cooperate with the brackets 13 and 14 there is provided a supporting bar 24. This bar is provided with a slot at each end to coiiperate with the tongues 20 and 21. To provide for the passing of the bolts 22 and 23 the forked ends of the bar are provided transversel with suitable holes.

'At a sultable point preferably near the bearings 7 the bar 24 is provided with a curved section 25. A lever 26 is pivotally mounted at 27 upon the bar 24. As shown in Fig. 1 the lever 26 is positioned transversely and one end is formed to provide an attachment for the rod 28. The rod 28 is preferably secured so that there may be relative movement between the lever 26 and the rod 28. The lower end of the lever 26 is preferably formed in such a manner that a suitable finger 29 is provided. This finger may be of any usua type of construction but is shown as having a rounded end indicated at 30.

The other end of the rod 28 connect-s with v to receive one end of a rod 35, which may lead to a timer and distributer (not shown). The holes 33 and 34 are thus adapted to provide an adjustable connection for the rods 28 and 35, and may be employed to vary the degree of movement imparted at the end of the rod 35.

The shaft 5 is provided at a suitable point with a disk like member 36 that may be secured in position upon the shaft in the usual or customary way, one of which is indicated by means of the key 37. The disk member 36 is provided at oppositely disposed points with the brackets indicated at 38 and 39. These brackets are adapted to provide a pivotal mounting 40 and 41 for the arms 42 and 43. In order to provide for this mounting the disk member 37 may be provided with suitable slots to accommodate the arms 42 and 43.

The arms 42 and 43 are provided at their free ends with the spherical enlargements indicated at 44 and 45. These enlargements constitute the usual balls commonly employed in centrifugally operated devices. Each of the balls is provided with ears or lugs 46, 47 48, and 49. The lugs 46 and 47 are formed upon the ball 44, and the lugs 48 and 49 are formed upon the ball 45.

As shown more particularly in Fig. 4 the lugs 46 and 47 are provided with pins indicated at 50 and 51. These pins may serve as guides for the coil springs indicated at 52 and 53. If desired, the pins 50 and 51 may .Fig. 1.

lVhen the shaft 5 is rotated the disk 36 be screwed or otherwise secured in the lugs 46 and 47 The springs 52 and 53 may have their ends secured in any suitable way to the lugs 46 and '47. The opposite ends of these One end of each ofthe stems 56 and 57 7 passes through the'nut-s 54 and 55 and roject within the springs 52 and 53.

hey will thus serve as guides for. the springs. The lowerv or opposlte ends, of the threaded These nuts serve as adjusting means v stems 56 and 57 are adapted to engage with.

the lugs 48 and 49. The stems 56 and 57 may be turned in and out through the lugs 48 and 49 so as to place the springs 52' and 53 under tension. They serve to vary the degree of movement upon rotation of the balls 44 and 45. The greater the extension of the springs 52 and 53 the greater the resiliency encountered by the balls 44 and 45 1 moving outward by centrifugal action.-

Mounted upon the shaft 5 is a member 58, and this member is adapted to slide on the shaft. Near each end of the member it is provided with the circumferential grooves 59 and 60.v As shown each end of the member 58 is provided with a suitable flange which forms one wall at each of the rooves. The member 58 is provided with a ho e therethrough that is of sufficient size to permit the member to readily slide to be moved axially on the shaft 5.

The groove 59 is adapted to have engaged with it the finger 29 having the rounded end 30. The groove 60 is adapted to coiiperate with the curved fingers 61 and 62 that are carried at one end of each of the arms 42 and 43. These curved fingers 61 and 62 preferably extend from near the pivotal mounting 40 and 41. The ends of the fingers 61 and 62 ride in the. groove 60 as shown in will also rotate and carry with it the arms 42 and 43. As the speeded rotation increases the balls 44 and 45 tend to move outward carrying with them the arms 42 and 43. As these arms are pivotally mounted at 41 and 42 the outward movement of-the balls will cause the fingers 61 and 62 to engage with the flange formed upon the end of the slidable member 58. The member 58 being freely movable on the shaft 5 will be pulled toward or to the left and nearer the disk 36.

The movement of the member 58 will at the same time cause the lever 26 to move be imparted to the rod 28. As the rod 28 is connected to one end or a limb of the bell crank lever 31 it will produce a movement in the rod 35. This rod 35 being connected to the other limb of the bell crank-lever will thus be seen that it must move in accordance with any movement of the bell-crank lever.

If at anytime it is desired to change the amount of throw or movement of the rod its end is positioned in a different one of the holes 34, and the rod 28 is positioned in another one of the holes 33. This will change the corresponding and relative movement of the rod 35 when acted upon by the centrifugal elements operating upon the slidable member 58. This type of governor is very sensitive to change of Speed and therefore the movement Will be in exact accordance with the movements of the several members. As the rod 35 .is connected with the timer and distributer this position Will be varied in a manner similar to the movement imparted by the slidable member. The time of ignition will then be automatically Varied to correspond with the engine speeds.

What is claimed is:

1. An automatic spark timing mechanism comprising longitudinally spaced bearings, a shaft rotatably mounted in the bearings, a vertical standard mounted on each bearing, a bar secured to the tops of the standards, a slidable sleeve mounted on the shaft, means carried by the shaft for operating the sleeve, a lever .pivotally connected to the bar and engaging the sleeve, a lever pivotally con- "nected to the top of the bar, a rod connecting the two levers, and a rod leading from the second mentioned lever to the timing mechanism.

2. An automatic spark timing mechanism comprising longitudinally spaced bearings, a shaft rotatably mounted in the bearings, a

' vertical standard mounted on each bearing,

a bar secured to the tops of the standards, a slidable sleeve mounted on the shaft, a cen trifugal governor connected to the shaft and engaging the sleeve, meansfor adjustin the tension of the centrifugal governor, a lever pivotally connected to the bar and engaging the sleeve, a lever pivotally connected to the top of the bar, a rod connecting the two levers, and a rod leading from the second mentioned lever to the timing mechanism.

3. An automatic spark'timing mechanism comprising longitudinally spaced bearings, a shaft rotatably mounted in the bearings, a vertical standard mounted on each bearing, a bar secured to the tops of the standards, a slidable sleeve mounted on the shaft and provided adjacent each end with an exterior groove, a disk keyed to the shaft adjacent the slidable sleeve, a centrifugal governor carried by the disk and adapted to engage the groove in one end of the sleeve, means for adjustin the tension of the centrifugal governor, a ever pivotally connected to the bar and engaging in the groove in the end of the sleeve opposite to the one engaged by the centrifugal governor, a lever pivotally connected to the top of the bar, a rod connecting the two levers, and a rod leading from the second mentioned lever to the timing mechanism.

n testimon whereof I aflix my signature in presence 0 two witnesses.

JOSEPH A. Ennis, Evnnn'rr L. WOLFE. 

